allotrophicadj.

1845 Monthly Jrnl. Med. Sci. Apr. 293 It might, with great advantage, have contained a short account of the Isomeric, or, as Berzelius calls them, the Allotrophic conditions of the elements.

1883 Amer. Engineer 7 Sept. 106/2 Here three allotrophic conditions are recognized, namely, diamond, graphite, and amorphous carbon.

1922 Mining & Metall. Feb. 62/2 The effect is most noticeable if one of the pair of metals is allotrophic.

1993 Materials Sci. & Engin. B. 18 260 Lanthanum sulfide..exhibits several different allotrophic forms.

1879 New Sydenham Soc. Lexicon Allotropic, term applied to substances which, whilst preserving their ordinary chemical and physical characters, lose their normal physiological nutritive properties, and may even become injurious.

1900 A. J. Ewart tr. W. Pfeffer Physiol. Plants I. vii. 363 Plants which are unable to assimilate carbon dioxide must obtain all their organic food-materials from without (heterotrophic or allotrophic nutrition).

1968 J. R. Beerbower Search for Past (ed. 2) 118 Plants are not required to be autotrophic—witness the Venus flytrap or the pitcher plant—or animals to be allotrophic—viz. the heterotrophic protozoans.

1927 E. A. Birge & C. Juday in Proc. Amer. Philos. Soc. 66 371 Most of the lakes derive organic matter both from within and from drainage bringing extractives from soil or marsh. Such lakes may be called allotrophic.

1975 E. Pieczyńska in A. D. Hasler Coupling Land & Water Syst. xi. 263 The importance of the allochthonous input is visible in typological classifications of lakes: e.g., allotrophic, mixotrophic, and autotrophic.

2004 K. Larsen Breaking Limit xvi. 103 He told me that Crater is ‘allotropic’... The lake is young and has only the beginnings of the plant life that will one day cloud its waters.